what is (void)dummy? nRF52840 SDK 14.0

[glypat22]

Hi there,

I came across the function call "(void)dummy;" which I am trying to locate. Where can I find this?

__STATIC_INLINE void nrf_rtc_event_clear(NRF_RTC_Type * p_rtc, nrf_rtc_event_t event)
{
    *((volatile uint32_t *)((uint8_t *)p_rtc + (uint32_t)event)) = 0;
#if __CORTEX_M == 0x04
    volatile uint32_t dummy = *((volatile uint32_t *)((uint8_t *)p_rtc + (uint32_t)event));
    (void)dummy; //puru: what is this? Is it calling some special function?
#endif
}

I think this will execute as it is a CortexM4 processor. And if yes then what function will it call? where is it located? Also what I observe is the first line is assigning the value as "0".

Am I interpreting it correctly?

Thanks!

[endnode]

There is no such function, this is only to suppress certain warning during ANSI C compilation (especially when you treat all warnings as errors which many people prefer). See various ways how to handle this here (and many more references on the internet).

[glypat22]

Thank you!